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Citric Acid 를 이용한 Ni / CaO-C 촉매의 제조 및 아세톤으로부터 MIBK 1단계 합성반응에의 적용
이호인,조규호,고병열 한국공업화학회 1999 응용화학 Vol.3 No.1
CaO-C catalysts were prepared by precipitating calcium acetate with citric acid for 4 hours in an aqueous solution at 80 ℃ followed by reduction at 500-100 ℃. The resultant average pore radius and BET surface area of CaO-C. CaO crystallite size, and CaO dispersion in CaO-C were about 15-25 A^˚. and 170-200 ㎡/g, 16.7 nm, and 7.4%, respectively. These values suggest that the highly dispersed CaO-C catalyst formed mainly due to the remained carbon acting as a spacer. The 4 wt% Ni/CaO-C reduced at 700 ℃ was used for one step synthesis of MIBK from acetone. 60-70% of acetone overall conversion and 70% of MIBK selectivity were obtained which are much higher than those ever reported. The DIBK selectivity was decreased drastically because the remained carbon lowered the basic strength of CaO.
이호인,허진목,오호진 한국공업화학회 1999 응용화학 Vol.3 No.2
Coupling reaction of methane and acetonitrile to form high value-added material was studied. The coupling reaction was conducted in non-oxidative condition to attain the target material with high selectivity by preventing the reactants from oxidation. As a result, propionitrile, coupled form of methane and acetonitrile, was produced on Ni/MgO catalyst with about 35% yield. In this non-oxidative condition, the byproduct due to the oxidation of reactants was not observed and so the selectivity to propionitrile amounted to nearly 100%. Li/MgO catalyst which has been known as a active catalyst for this model reaction in oxidative condition showed less than 0.2% acetonitrile conversion in the range of 400 ℃ ∼ 650 ℃ reaction temperature. Whereas, in this case, the main product was acrylonitrile, dehydrogenated form of propionitrile. In the non-oxidative coupling reaction of methane and acetonitrile, the rate-determining step was methane activation, and the Ni component doped played a major role in methane activation.
이호동(Ho Dong Lee)(李好童) 위기관리 이론과 실천 2011 Crisisonomy Vol.7 No.3
오늘날은 위기관리의 시대다. 그러나 정치적 이슈로서는 항상 후순위이며, 위기관리 정책이나 조직에 대한 정치적ㆍ재정적 지원이 결여되어 있다. 그리고 일차대응 책임주체인 지자체는 항상 조직, 인력, 재정 등의 자원부족에 처해 있다. 다양한 위기에 대한 지자체의 체계적인 대응의 중요성이 높아지고 있고, 중앙ㆍ지방의 협력관계는 무엇보다도 중요하게 인식되고 있다. 특히, 우리나라는 지자체의 위기관리 역량을 강화하기 위하여 전문조직, 전문인력 등의 구축ㆍ체계화를 위한 정책기조가 필요하다. 위기를 다루는 국가의 역량은 정부가 얼마나 심각하게 특정 이슈에 대해 생각하는가에 좌우된다. 이에 일본의 사례분석을 통해 우리나라에의 적용가능성과 지자체 위기관리역량을 제고하기 위한 방안을 제시한다. Despite the importance of crisis management, crisis management agencies and programs have not received the political and fiscal support that they should have. The capacity of government to cope with crisis depends on how seriously the government thinks about this particular issue. A further important things that the relationship between local and central governments is the central issue, and local governments need to have their own strong crisis management systems, which will allow them not to rely heavily on central government when the crisis occurs. Local governments need to have their own crisis management institutions. Therefore decentralization is important in crisis empower local governments so that they have discretion in their decision making, but also provides more budget, human resources. Trained personnel are no less a resource than specialized equipment. Lastly, governments out to threat crises and disaster like the treat any other policy sectors such as education, health, or agriculture, and so on.